Trolley-wheel construction.



W. H. ARNOLD.

TROLLBY WHEEL CONSTRUCTION.

APPLICATION FILED DEO.26,1912.

Patented ,Aug. 19, 1913.

W GUM/mm unrrnn srnr WILLIAM H. ARNOLD, OF STOCKTON, CALIFORNIA.

TROLLEY-WHEEL CONSTRUCTION.

Application filed December 26, 1912.

To all whom it may concern:

Be it known that I, \VILLIAM I-I. ARNOLD, a citizen of the UnitedStates, residing at Stockton, in the county of San Joaquin, State ofCalifornia, have invented certain new and useful Improvements inTrolleylVheel Construction; and I do declare the following to be aclear, full, and exact description of the same, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to thecharacters of reference marked thereon, which form a part of thisapplication.

This invention relates to improvements in trolley wheels andparticularly to the bearing means thereof and means for inserting thesame in the trolley harp, the object of the invention being to produce asimplified form of direct contact means between the trolley wheel andthe bearing pin and the harp and thence to the motor mechanism of thecar.

A further object of the invention is to produce a simple and inexpensivedevice and yet one which will be exceedingly effective for the purposesfor which it is designed.

These objects, I accomplish by means of such structure and relativearrangement of parts as will fully appear by a perusal of the followingspecification and claims.

On the drawings similar characters of reference indicate correspondingparts in the several views.

Figure 1 is a sectional view of the trolley harp construction showingthe contact means therein. Fig. 2 is a sectional view taken on a line XXof Fig. 1. Fig. 3 is a detached side view of a contact pin spring.

teferring now more particularly to the characters of reference on thedrawings, the numeral 1 designates the pin of the trolley .harp 2 whichtrolley harp is suitably constructed to receive upon said pin anotherpin 3 on which are two spaced bearing shoulders 4L disposed over whichare two bushings 5 inclosed in a casing 6. Said casing 6 is disposedwithin the hub of the said trolley wheel 8. If desired the casing 6 maybe held in the hub 7 by means of set screws 9 or other suitable meansthus permitting the said cas- Specification of Letters Patent.

Patented Au 19,1913.

Serial No. 738,508.

ing 6 to be removed and replaced. As stated, shoulders 4c are spacedapart and in the intermediate space is a helical spring 10. A portion ofsaid spring, as at 11, projects gradually out of the plane of the outercircumference of said spring, said outer circumference of said springbearing against the inside of the casing 6, while the apex 11 bearscontinuously against one of the shoulders 4. Thus a continuousconnection is made between the wheel 8, hub 7, casing 6, spring 10, apexor spring 11, shoulder 4, pin 3 and pin 1 to the harp 2 and thence inthe usual manner to the machinery of the car upon which the trolley harpis mounted.

From the foregoing description it will readily be seen that I haveproduced such a device as substantially fulfils the objects of theinvention as set forth herein.

While this specification sets forth in detail the present and preferredconstruction of the device, still in practice such deviations from suchdetail may be resorted to as do not form a departure from the spirit ofthe invention.

Having thus described my invention what I claim as new and useful anddesire to se cure by Letters Patent is:

1. A device of the character described comprising a hub, a bearing pinin said hub having two shoulders spaced apart, a substantially conicalshaped helical spring in said hub between said shoulders, the outerperiphery of said spring bearing against said hub, the apex of saidspring bearing against one of said shoulders and its base against theother shoulder.

2. A device of the character described comprising a wheel, a hubthereon, a casing in said hub, a pin in said casing having two spacedshoulders, bushings in said casing disposed centrally With respect tosaid hub, In testimony whereof I aflix my signature a substaintiallyconica shaped helical spring in presence of tWo Witnesses. inounte inthe s ace etween said shoulders, the outer periph ery of said springbearing WVILLIAM ARNOLD 5 against said hub, the apex of said springWitnesses:

bearing against one of said shoulders and its STEPHEN M. BLEWETT, baseagainst the other shoulder. CLARENCE M. SMITH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

